diff options
Diffstat (limited to 'kernel/sound/oss/kahlua.c')
| -rw-r--r-- | kernel/sound/oss/kahlua.c | 229 |
1 files changed, 229 insertions, 0 deletions
diff --git a/kernel/sound/oss/kahlua.c b/kernel/sound/oss/kahlua.c new file mode 100644 index 000000000..c4b0434c7 --- /dev/null +++ b/kernel/sound/oss/kahlua.c @@ -0,0 +1,229 @@ +/* + * Initialisation code for Cyrix/NatSemi VSA1 softaudio + * + * (C) Copyright 2003 Red Hat Inc <alan@lxorguk.ukuu.org.uk> + * + * XpressAudio(tm) is used on the Cyrix MediaGX (now NatSemi Geode) systems. + * The older version (VSA1) provides fairly good soundblaster emulation + * although there are a couple of bugs: large DMA buffers break record, + * and the MPU event handling seems suspect. VSA2 allows the native driver + * to control the AC97 audio engine directly and requires a different driver. + * + * Thanks to National Semiconductor for providing the needed information + * on the XpressAudio(tm) internals. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2, or (at your option) any + * later version. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * TO DO: + * Investigate whether we can portably support Cognac (5520) in the + * same manner. + */ + +#include <linux/delay.h> +#include <linux/init.h> +#include <linux/module.h> +#include <linux/pci.h> +#include <linux/slab.h> + +#include "sound_config.h" + +#include "sb.h" + +/* + * Read a soundblaster compatible mixer register. + * In this case we are actually reading an SMI trap + * not real hardware. + */ + +static u8 mixer_read(unsigned long io, u8 reg) +{ + outb(reg, io + 4); + udelay(20); + reg = inb(io + 5); + udelay(20); + return reg; +} + +static int probe_one(struct pci_dev *pdev, const struct pci_device_id *ent) +{ + struct address_info *hw_config; + unsigned long base; + void __iomem *mem; + unsigned long io; + u16 map; + u8 irq, dma8, dma16; + int oldquiet; + extern int sb_be_quiet; + + base = pci_resource_start(pdev, 0); + if(base == 0UL) + return 1; + + mem = ioremap(base, 128); + if (!mem) + return 1; + map = readw(mem + 0x18); /* Read the SMI enables */ + iounmap(mem); + + /* Map bits + 0:1 * 0x20 + 0x200 = sb base + 2 sb enable + 3 adlib enable + 5 MPU enable 0x330 + 6 MPU enable 0x300 + + The other bits may be used internally so must be masked */ + + io = 0x220 + 0x20 * (map & 3); + + if(map & (1<<2)) + printk(KERN_INFO "kahlua: XpressAudio at 0x%lx\n", io); + else + return 1; + + if(map & (1<<5)) + printk(KERN_INFO "kahlua: MPU at 0x300\n"); + else if(map & (1<<6)) + printk(KERN_INFO "kahlua: MPU at 0x330\n"); + + irq = mixer_read(io, 0x80) & 0x0F; + dma8 = mixer_read(io, 0x81); + + // printk("IRQ=%x MAP=%x DMA=%x\n", irq, map, dma8); + + if(dma8 & 0x20) + dma16 = 5; + else if(dma8 & 0x40) + dma16 = 6; + else if(dma8 & 0x80) + dma16 = 7; + else + { + printk(KERN_ERR "kahlua: No 16bit DMA enabled.\n"); + return 1; + } + + if(dma8 & 0x01) + dma8 = 0; + else if(dma8 & 0x02) + dma8 = 1; + else if(dma8 & 0x08) + dma8 = 3; + else + { + printk(KERN_ERR "kahlua: No 8bit DMA enabled.\n"); + return 1; + } + + if(irq & 1) + irq = 9; + else if(irq & 2) + irq = 5; + else if(irq & 4) + irq = 7; + else if(irq & 8) + irq = 10; + else + { + printk(KERN_ERR "kahlua: SB IRQ not set.\n"); + return 1; + } + + printk(KERN_INFO "kahlua: XpressAudio on IRQ %d, DMA %d, %d\n", + irq, dma8, dma16); + + hw_config = kzalloc(sizeof(struct address_info), GFP_KERNEL); + if(hw_config == NULL) + { + printk(KERN_ERR "kahlua: out of memory.\n"); + return 1; + } + + pci_set_drvdata(pdev, hw_config); + + hw_config->io_base = io; + hw_config->irq = irq; + hw_config->dma = dma8; + hw_config->dma2 = dma16; + hw_config->name = "Cyrix XpressAudio"; + hw_config->driver_use_1 = SB_NO_MIDI | SB_PCI_IRQ; + + if (!request_region(io, 16, "soundblaster")) + goto err_out_free; + + if(sb_dsp_detect(hw_config, 0, 0, NULL)==0) + { + printk(KERN_ERR "kahlua: audio not responding.\n"); + release_region(io, 16); + goto err_out_free; + } + + oldquiet = sb_be_quiet; + sb_be_quiet = 1; + if(sb_dsp_init(hw_config, THIS_MODULE)) + { + sb_be_quiet = oldquiet; + goto err_out_free; + } + sb_be_quiet = oldquiet; + + return 0; + +err_out_free: + kfree(hw_config); + return 1; +} + +static void remove_one(struct pci_dev *pdev) +{ + struct address_info *hw_config = pci_get_drvdata(pdev); + sb_dsp_unload(hw_config, 0); + kfree(hw_config); +} + +MODULE_AUTHOR("Alan Cox"); +MODULE_DESCRIPTION("Kahlua VSA1 PCI Audio"); +MODULE_LICENSE("GPL"); + +/* + * 5530 only. The 5510/5520 decode is different. + */ + +static const struct pci_device_id id_tbl[] = { + { PCI_VDEVICE(CYRIX, PCI_DEVICE_ID_CYRIX_5530_AUDIO), 0 }, + { } +}; + +MODULE_DEVICE_TABLE(pci, id_tbl); + +static struct pci_driver kahlua_driver = { + .name = "kahlua", + .id_table = id_tbl, + .probe = probe_one, + .remove = remove_one, +}; + + +static int __init kahlua_init_module(void) +{ + printk(KERN_INFO "Cyrix Kahlua VSA1 XpressAudio support (c) Copyright 2003 Red Hat Inc\n"); + return pci_register_driver(&kahlua_driver); +} + +static void kahlua_cleanup_module(void) +{ + pci_unregister_driver(&kahlua_driver); +} + + +module_init(kahlua_init_module); +module_exit(kahlua_cleanup_module); + |